Watch-repairer&#39;s tool.



I. T. MADDOGKS.

WATGH'RBPAIRERS TOOL.

APPLICATION FILED DEG. 11, 1912.

1 ,070,1 5 0. Patented Aug. 12, 1913.

UNITED STATES PATENT OFFICE.

WATCH-BEPAIRERS TOOL.

Specification of Letters Patent.

Patented Au ;12,1913.

Application filed December 11, 1912. Serial No. 736,141.

To all whom it may concern:

Be it known that I, Isaac T. Maooooxs,

a citizen of the United States, residing at Sherman Mills, in the county of Aroostook, State of Maine, have invented certain new and useful Improvements in VVatch-Repairers Tools; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. V

This invention relates to watch repairers tools, and particularly to a tool which will enable the watch repairer to locate the correct position of the hair spring stud with relation to the jewel pin in the roller table.

The object of the invention resides in the provision of a tool of the character named which will enable the location of the hair spring stud with relation to the jewel pin in the roller table to be determined with facility and after ascertaining the correct relative position of such parts will further enable the latter to be quickly and readily assembled in proper relation through the medium of the tool.

A further object of the invention resides in the provision of a tool which will enable the repairer to have an unlimited number of balance elements of a watch movement apart at the same time without the necessity of keeping a record with respect to each movement and at the same time assure the correct assembling of the balance elements of each movement.

With the above and other objects in View the invention consists in the details of construction and in the arrangement and combination of parts -to be hereinafter more fully described and particularly pointed out in the appended claims.

In describing the invention in detail reference will be had to the accompanying drawings wherein like characters of reference denote corresponding parts in the several views, and in which Figure l is a plan view of a tool constructed in accordance with the invention. Fig. 2 a section on the line 22 of Fig. 1. Fig. 3 a side elevation of the tool. Fig. 4 a plan view of a watch movement showing the tool applied thereto at random, the tool in this instance not being adjusted to indicate the correct location of the hair spring stud. Fig. 5 a view similar to Fig. 4 with the tool adjusted to indicate the correct position of the hair spring stud relatively to other portions of the balance elements, and Fig. 6 a view similar to Fig. 2 showing the manner of applying the balance elements to the tool so as to effect the assembling of said elements in correct relation.

Referring to the drawings, the tool is shown as comprising a body in the form of a rectangular plate 10 provided at each corner with a leg 11. The plate 10 is provided centrally with a circular opening which is divided by a plurality of radial arms 11 so as to form independent openings 12, said arms being enlarged at their junction to form a circular hub, it being noted that in the construction of the tool the arms 11 are preferably formed integral with the plate 10. Extending into one of the openings 12, and formed integral with the plate 10 is a finger 141 and formed in the hub 18 in line with the finger 14 is a recess 15 which communicates with the opening 12 in which the finger 14: is disposed. Rotatably mounted upon the hub 13 is an index arm 16, While formed centrally of the hub 13 is an opening 17 for the reception of the balance staff of the watch movement as will hereinafter appear. Marked upon the plate 10 around the openings 12 are graduations 18 which are numbered so that zero and the highest number of said graduations will be disposed at the inner end of the finger 14.

In the use of the tool same is placed upon the watch movement indicated generally at A in Figs. I and 5 and then adjusted with the right hand so that the finger 14 points directly to the pivot 19 of the balance lever of the watch movement. The index arm is then adjusted so as to lie directly over the hair spring stud hole in the balance cock. With the parts of the tool in this adjusted. relation same is removed from the movement and placed upon the bench. The balance elements are then applied to the tool with the balance staff inserted through the opening 17 and the roller jewel inserted into the recess 15, said balance staff and roller jewel being indicated in Fig. 6 at 20 and 21 respectively, while the balance wheel is indicated in said figure at 22. With the bal ance element associated with the tools in the manner just described the hair spring indicated at 23 in Fig. 6 is secured at its. inner end to the balance staff 20 in the usual manner with the hair spring stud indicated at 24 positioned directly over the index arm 16 which will assure the proper positioning of the hair spring stud with respect to the roller jewel and result in the proper beatwhen the balance elements are restored to the movement in the same relation that exists between them when they are removed from the tool.

If desired records of the relative positions of the balanceelements of various movements may be kept through the medium of the graduations 18 but this step is wholly op tional and is not necessary as an aid to the operation of the tool.-

What I claim is 1. A tool for locating the position of the hair spring stud of watches comprising a plate having an opening therein, a finger extending into said opening for indicating the position of the balance lever pivot, an index arm pivoted 011 the plate for movement across the opening to indicate the position of the hair spring stud, and said plate being provided with an opening coincident with the axis of rotation of said index arm for receiving the balance staff and further provided with a recess for the reception of the roller jewel, said recess communicating with said opening in the plate and disposed in line with said finger and the opening which receives the balance staff;

2. A tool for locating the position of the hair spring stud of watches comprising aplate having a plurality of openings therein separated by arms radiating from a common center, said arms being enlarged at their junction to form a circular hub, an index arm pivoted on said hub for indicating the position of the hair spring stud and the latter being provided with an opening coincident with the axis of rotation of the index arm and for the reception of the balance staff, and further provided with a recess for the reception of the roller jewel, said recess communicating with one of the openings in the plate, and fingers carried by the plate and extending into one of the openings thereof for indicating the position of the balance lever pivot, said finger being disposed in line with the opening and recess in the hub.

In testimony whereof, I ailix my signature, in the presence of two witnesses.

ISAAC T. MADDOCKS.

Witnesses:

J UANITA A. ELLISON, HAnoLn I. Mannocns.

flopies'of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

